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Babu SH Kumar KS Suvardhan K Kiran K Rekha D Krishnaiah L Janardhanam K Chiranjeevi P 《Environmental monitoring and assessment》2007,128(1-3):241-249
A procedure was developed for the determination of Cd, Cu, Zn, Co, Ni, Mn, Pb and Mo in water samples by inductively coupled
plasma atomic emission spectrometry (ICP-AES) after preconcentration on a morpholine dithiocarbamate (mor-DTC) supported by
bagasse (Saccharam aphisinaram). The sorbed elements were subsequently eluted with 4,M HNO3 and the acid eluates were analysed by ICP–AES. The influence of various parameters such as pH, flow rate of sample, eluent
concentration, volume of the sample and volume of eluent were investigated to enhance the sensitivity of the present method.
A 20,mL disposable syringe served as preconcentration column. Under the optimal conditions Cd, Cu, Zn, Co, Ni, Mn, Pb and
Mo in aqueous sample was concentrated about 100-fold. The sorption recoveries of elements were higher than 99.6%. The method
is also applied for the analysis of natural and spiked water samples. 相似文献
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Kumar KS Suvardhan K Rekha D Kiran K Jayaraj B Janardhanam K Chiranjeevi P 《Environmental monitoring and assessment》2007,127(1-3):67-72
Facile, selective and sensitive spectrophotometric method has been developed for the determination of bendiocarb in its insecticidal
formulations, fortified water, food grains, agriculture wastewater and agriculture soil samples with prepared reagents. The
method was based on alkaline hydrolysis of the bendiocarb pesticide, and the resultant hydrolysis product of bendiocarb was
coupled with 2,6-dibromo-4-methylaniline to give a yellow color product with λmaxof457 nmorcouplingwith2, 6−dibromo−4−nitroanilinetoproducearedcoloredproductwithλmax
of474~nmorcouplingwith2, 4, 6−tribromoanilinetoformorangeredcoloredproducthasaλmax
of465 nm.Underoptimalconditions, Beer'slawrangefor2, 6−dibromo−4−methylaniline(DBMA)wasfoundtobe0.6−−14.0~μgmL
-1, 0.8−−10.0 μgmL
-1
for2, 6−dibromo−4−nitroaniline(DBNA)and0.4−−10.0 μgmL
-1
for2, 4, 6−tribromoaniline(TBA).Themolarabsorptivityofthecolorsystemswerefoundtobe4.126~×~104
lmol
-1 cm
-1
forDBMA, 3.254×104
l~mol
-1 cm
-1
forDBNAand2.812×104
lmol
-1 cm
-1
forTBA.Sandell'softhecolorreactionsare0.018 μgcm
-2(DBMA), 0.052 μgcm
-2(DBNA)and0.065 μgcm
-2$ (TBA) respectively. The effect of the non-target species on the determination of bendiocarb was studied. The formation of
colored derivatives with the coupling agents is instantaneous and stable for 18 h, 30 h, and 12 h. Performance of the proposed
methods were compared statistically in terms Student's F and t-tests with the reported methods. 相似文献
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Kumar KS Suvardhan K Rekha D Kiran K Rao GC Jayaraj B Janardhanam K Chiranjeevi P 《Environmental monitoring and assessment》2007,129(1-3):271-276
Facile, selective and sensitive spectrophotometric method has been developed for the determination of carbosulfan in insecticidal
formulations, fortified water, food grains, agriculture wastewater and soil samples with newly synthesized reagents. The method
was based on acid and alkaline hydrolysis of the carbosulfan pesticide, and the resultant hydrolysis product of carbosulfan
was coupled with 2,6-dibromo-4-methylaniline to give a yellow color product with λ
max of 464 nm or interaction with 2,6-dibromo-4-nitroaniline to produce yellow colored product with λ
max of 408 nm or coupling with 2,4,6-tribromoaniline to form red colored product has a λ
max of 471 nm. Under optimal conditions, Beer’s law range for 2,6-dibromo-4-methylaniline (DBMA) was found to be 0.2–12.0 μg
ml−1, 0.6–16.0 μg ml−1 for 2,6-dibromo-4-nitroaniline (DBNA) and 0.4–15.0 μg ml−1 for 2,4,6-tribromoaniline (TBA). The molar absorptivity of the color systems were found to be 3.112 × 104 l mol−1 cm−1 for DBMA, 3.214 × 104 l mol−1 cm−1 for DBNA and 3.881 × 104 l mol−1 cm−1 for TBA. Sandell’s of the color reactions are 0.013 μg cm−2 (DBMA), 0.012 μg cm−2 (DBNA) and 0.011 μg cm−2 (TBA) respectively. The effect of the non-target species on the determination of carbosulfan was studied to enhance the selectivity
of the proposed methods. The formation of colored derivatives with the coupling agents is instantaneous and stable for 28,
30, and 26 h. Performance of the proposed methods were compared statistically in terms Student’s F and t-tests with the reported methods.
An erratum to this article can be found at 相似文献
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Gnanaprakasam Pavidra Devi Vanisree Arambakkam Janardhanam 《Environmental science and pollution research international》2022,29(50):75103-75112
Environmental Science and Pollution Research - 相似文献
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